“Sand fencing on a beach or dune can assist in building a new foredune or fill gaps in dune ridges. The fence reduces local wind speed and traps sand, with different fence configurations creating different dune forms and heights. For example, fencing running parallel to the shoreline can build a protective dune ridge while zig-zag arrangements can create wider, more natural appearing dunes supportive of vegetation growth.”
When visiting Nauset Beach, many people stop to take a photo of the sand fences up in the dunes. They seem to be so classic Cape Cod while they are hard at work!